Cutler-Hammer WMS3C40 3-Pole Circuit Breaker, 480VAC 40Amp

The Cutler‑Hammer WMS3C40 is a compact 3‑pole miniature circuit breaker designed for industrial control panels and machinery protection, providing reliable overcurrent and short‑circuit protection for three‑phase AC systems up to 480 VAC.
Manufacturer: Cutler‑Hammer (Eaton)
Product Series: WMS
Catalog Number: WMS3C40
Device Type: Miniature Circuit Breaker (MCB)
Number of Poles: 3
Trip Curve: C curve
Rated Current: 40 A
Rated Voltage AC: Up to 480 VAC
Rated Insulation Voltage (Ui): 500 VAC
Rated Frequency: 50/60 Hz
Breaking Capacity (UL 1077):
277/480 VAC: 5 kA
Breaking Capacity (IEC 60898):
240/415 VAC: 10 kA
Breaking Capacity (IEC 60947‑2):
240/415 VAC: 10 kA
Standards Compliance: UL 1077, CSA C22.2, IEC 60898, IEC 60947‑2
Trip Mechanism: Thermal‑magnetic
Protection Functions: Overload and short‑circuit
Switching Function: Manual ON/OFF toggle
Contact Position Indicator: Integrated mechanical indicator
Mounting Type: DIN rail mount (35 mm)
Terminal Type: Screw clamp terminals
Conductor Size: Typical up to 16 mm² (application dependent)
Housing Material: Flame‑retardant thermoplastic
Housing Color: Light gray
Operating Temperature: –25 to +55 °C
Storage Temperature: –40 to +70 °C
Ingress Protection: IP20 (front)
Typical Applications: Motor feeders, control panels, industrial machinery, distribution boards
Certifications Marked on Unit: UL, CSA, CE
Country of Manufacture: United States
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